老托福阅读真题PASSAGE 92-智课教育旗下智课教育.pdf

智 课 网 托 福 备 考 资 料老托福阅读真题PASSAGE 92-智课教育旗下智课教育本文和大家分享的是老托福阅读真题PASSAGE 92，练习真题是最重要也最有效的复习方法，大家在复习托福阅读考试的时候一定要对真题重视起来。托福阅读 的思维方式就是托福阅读的出题方式，只有掌握了这种思维方式，才有可能在做题之前，预测到新托福阅读题的出题形式和特点，为找答案节省时间。老托福阅读试题的核心价值，在于其最贴近真题的阅读思维方式。此外老托福阅读真题比新托福IBT阅读文章要短，比较容易适应。这也是大家在备考托福的 时候非常重要 的一点。因为前期的入手如果能从容易的开始，就会形成一个循序渐进的过程方式让大家的练习有一个提高的过程。既然老托福阅读试题有这样的效果，那我们如何利用那有限的真题来达到锻炼自己的目的呢?事实上这就一个办法，就是坚持。本期为大家推荐老托福阅读的真题PASSAGE92，有原文及答案，希望对托福考生备考有所帮助。There are only a few clues in the rock record about climate inthe Proterozoic eon.Much of our information about climate inthe more recent periods of geologic history comes from thefossil record,because we have a reasonably good understandingof the types of environment in which many fossil organismsflourished.The scarce fossils of the Proterozoic,mostlysingle-celled bacteria,provide little evidence in this regard.However,the rocks themselves do include the earliest evidencefor glaciation,probably a global ice age.The inference that some types of sedimentary rocks are theresult of glacial activity is based on the principle ofuniformitarianism,which posits that natural processes now atwork on and within the Earth operated in the same manner in thedistant past.The deposits associated with present-day glaciershave been well studied,and some of their characteristics arequite distinctive.In 2.3-billion-year-old rocks in Canada near LakeHuron(dating from the early part of the Proterozoic age),thereare thin laminae of fine-grained sediments that resemble varves,the annual layers of sediment deposited in glacial lakes.Typically,present-day varves show two-layered annual cycle,one layercorresponding to the rapid ice melting and sediment transport ofthe summer season,and the other,finer-grained,layercorresponding to slower winter deposition.Although it is noteasy to discern such details in the Proterozoic examples,they arealmost certainly glacial varves.These fine-grained,layeredsediments even contain occasional large pebbles or dropstones,a characteristic feature of glacial environments where coarsematerial is sometimes carried on floating ice and dropped farfrom its source,into otherwise very fine grained sediment.Glacialsediments of about the same age as those in Canada have beenfound in other parts of North America and in Africa,India,andEurope.This indicates that the glaciation was global,and that fora period of time in the early Proterozoic the Earth was gripped inan ice age.Following the early Proterozoic glaciation,however,theclimate appears to have been fairly benign for a very long time.There is no evidence for glaciation for the next 1.5 billion yearsor so.Then,suddenly,the rock record indicates a series of glacialepisodes between about 850 and 600 million year ago,near theend of the Proterozoic eon.1.Which of the following does the passage mainly discuss?(A)How patterns in rock layers have been used to constructtheories about the climate of the Proterozoic age(B)What some rare fossils indicate about glacial conditionsduring the late Proterozoic age(C)The varying characteristics of Proterozoic glacial varves indifferent parts of the world(D)The number of glacial episodes that the Earth hasexperienced since the Proterozoic age2.According to the passage,the fossil record of theProterozoic eon is(A)highly regarded because it preserves the remains ofmany kinds of organisms(B)less informative than the fossil record of more recentperiods(C)very difficult to interpret due to damage from bacteria(D)more useful to researchers than otheraspects of the rockrecord3.The word scarce in line 4 is closest in meaning to(A)ancient(B)tiny(C)available(D)rare4.It can be inferred from the passage that the principle ofuniformitarianism indicates that(A)similar conditions produce similar rock formations(B)rock layers in a given region remain undisturbed overtime(C)different kinds of sedimentary rocks may have similarorigins(D)each continent has its own distinctive pattern ofsediment layers5.The word resemble in line 14 is closest in meaning to(A)result from(B)penetrate(C)look like(D)replace have similar origins6.According to the passage,the layers in varves areprimarily formed by(A)fossilized bacteria(B)pieces of ancient dropstones(C)a combination of ancient and recent sediments(D)annual cycles of sediment transport and deposition7.The phrase the other in line 17 refers to another(A)annual cycle(B)glacial lake(C)layer of sediment(D)season8.According to the passage,the presence of dropstonesindicates that(A)the glacial environment has been unusually servere(B)the fine-grained sediment has built up very slowly(C)there has been a global ice age(D)coarse rock material has been carried great distances9.Why does the author mention Canada,North America,Africa,India,and Europe in lines 23-24?(A)To demonstrate the global spread of dropstones(B)To explain the principles of varve formation(C)To provide evidence for the theory that there was aglobal ice age in the early Proterozoic eon(D)To illustrate the varied climatic changes of theProterozoic eon in different parts of the globe10.Which of the following terms is defined in the passage?(A)fossil record(line 3)(B)laminae(line 13)(C)varves(line14)(D)glacial episodes(line 28)参考答案：ABDAC DCCCC以上就是本期整理的老托福阅读真题，考生可进行参考训练以提高自己的考试水平。若您想了解托福考试更多相关信息请关注智课教育。